I finally got tired of the horrible bumper on the back of the Short Bus, so I decided to replace it as quickly and cheaply as I could. I had a bunch of 3" sch40 lying around I intended to use, and after removing the old bumper, I made a wonderful discovery. The old bumper bolt holes were spaced perfectly to accept u-bolts around the 3" pipe. 10 minutes at the spring shop, and ta-da, the ugliest, cheapest, nasty looking redneck pipe bumper ever fitted. Should I ever build an OBA setup, I'll just have the pipe ends cut with threads so I can screw on caps, instant air tank!